Mathematics is merely the means to a general and ultimate knowledge of man.

If a man wishes to rid himself of a feeling of unbearable oppression, he may have to take hashish.

What was silent in the father speaks in the son, and often I found in the son the unveiled secret of the father.

The radical hostility, the deadly hostility against sensuality, is always a symptom to reflect on: it entitles us to suppositions concerning the total state of one who is excessive in this manner.

All idealists imagine that the causes they serve are fundamentally better than any other causes in the world, and they refuse to believe that if their cause is to flourish at all it requires precisely the same foul-smelling manure that is necessary to all other human undertakings.

To get into just those situations where sham virtues will not suffice, but rather where, as with the ropedancer on his rope, one either falls or stands--or gets down.

Speaking generally, punishment hardens and numbs, it produces concentration, it sharpens the consciousness of alienation, it strengthens the power of resistance.